MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
145 - Table './balkania_forum/mybb_sessions' is marked as crashed and should be repaired
Query:
REPLACE INTO mybb_sessions SET `uid`=0,`sid`='562a33b7451ad3eceae24897418d63f1',`time`=1711716804,`ip`=X'2cc5d624',`location`='/newreply.php?tid=358&replyto=2221',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0